Tell Me Something

Han Suk-kyu

as

Detective Cho

Shim Eun-ha

as

Chae Su-yeon

Jang Hang-seon

as

Detective Oh

Yu Jun-sang

as

Kim Ki-yeon

Yum Jung-ah

as

Oh Seung-min

Ahn Suk-hwan

as

Prosecutor Gu

Kim Jung-hak

as

Detective Lee

Gil Eun-hye

as

Young Soo-yeon

Park Cheol-ho

as

Section Chief ...

Lee Hwan-jun

as

Detective Kim

Kwon Tae-won

as

Chae Yong-hoon

Lee Dae-ro

as

Chief of Police

Maeng Bong-hak

as

Museum Colleag...

Kwon Nam-hee

as

Soo-yeon's Mot...